| A | B |
|---|
| Element | Made up of only 1 type of atom |
| Compound | A combination of 2 or more elements |
| Pure Substance | A combination that can only be separated with a chemical reaction |
| Mixture | A combination that can be separated by hand |
| Heterogeneous Mixture | A mixture that is different depending on where you take the sample from |
| Homogeneous Mixture | A mixture that is the same all the way through |
| Proton | Positive! |
| Neutron | Neutral! |
| Electron | Negative! |
| Atomic # | The number of protons in an atom (also the number of electrons) |
| Atomic Mass | # of Protons + # of Neutrons |
